890042 has 4 divisors (see below), whose sum is σ = 1335066. Its totient is φ = 445020.

The previous prime is 890027. The next prime is 890053. The reversal of 890042 is 240098.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240098 = 2 ⋅120049.

It can be written as a sum of positive squares in only one way, i.e., 564001 + 326041 = 751^2 + 571^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 890042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222509 + ... + 222512.

2⁸⁹⁰⁰⁴² is an apocalyptic number.

890042 is a deficient number, since it is larger than the sum of its proper divisors (445024).

890042 is a wasteful number, since it uses less digits than its factorization.

890042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445023.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 890042 is about 943.4203728985. The cubic root of 890042 is about 96.1915302384.

The spelling of 890042 in words is "eight hundred ninety thousand, forty-two".